Maybe for some players, but not for all. Bruno G. came for the same price he was rumored to go to Arsenal for; I love that he paid them back for being slow in the market. Trippier actually came for a song, because he has family in the area. He's going to make a great captain and help attract others. Bruno keeps telling his friend Paqueta (sp?) to come and form a central midfield partnership again, and the guy came to visit and was playing backyard in Newcastle colors! Targett was very reluctant to join and only did so for game time, but now loves it and wants to come back. Then again, he's not world class, but would be a solid addition.
That's just a handful of players, though. You're right, overall. For a while it'll take some tempting for those top clubs. Thankfully there's no fan pressure to do it in a hurry. Despite the incompetent press trying to paint Newcastle fans as delusional, all we've ever demanded is a team that tries. Steady progress over the course of the next few years will be awesome. Hell, just knowing the goal isn't to merely survive will be huge!